Typescript GL

TGL (Typescript GL) is a very lightweight WebGL library written in Typescript

Goals

TGL aims to provide...

• ...a clean and intuitive API to the full functionalty of WebGL.
• ...a object-oriented, type-safe wrapper around WebGL.
• ...small, focused packages to keep your payload small.
• ...sensible defaults to reduce verbosity and prevent errors.

Features

• Classes for OpenGl primitives like buffers, textures and shaders.
• No interdependencies: You can use each class as a standalone.
• Options based initialization for WebGL primitives which sensible default values.
• Grouped enumerations for WebGL constants - no more 'Invalid enum' errors.
• A 'Drawable' class to orchestrate all primitives together and render an image.
• Performance boosts through WebGL state caching.
• Zero dependencies (except tslib), 5k gziped, tree-shaking support.

Installation

npm install --save @tgl/core

If you are using yarn

yarn add @tgl/core

Usage

Drawing a simple triangle:

import { TglContext, Drawable, GlClearFlags } from '@tgl/core'

// create a canvas
const canvas = document.createElement('canvas');
canvas.width = 320;
canvas.height = 240;
document.body.appendChild(canvas);

// use of TglContext is completely optional
const context = new TglContext(canvas);
// get the WebGLRenderingContext 
const gl = context.webGlRenderingContext;

// define shaders (TGL can also load shaders from files)
const fragmentShader = `precision mediump float;
void main(void) {
    gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}`;
const vertexShader = `precision mediump float;
attribute vec2 aPosition;

void main(void) {
    gl_Position = vec4(aPosition, 1.0, 1.0);
}`;

// express what you want to render in a drawable object
const drawable = new Drawable(gl, {
    buffers: [{
        // the triangle
        data: [-0.5,-0.5, 0.5,-0.5, 0,0.5],
        // tell the shader that this data should go to aPosition and is interpreted as a vec2 
        attributes: [{ name: 'aPosition', components: 2 }]
    }],
    shader: {
        vertexSource: vertexShader,
        fragmentSource: fragmentShader 
    }
});

// clear the screen black
context.clearColor = [0, 0, 0, 1];
context.clear(GlClearFlags.COLOR_BUFFER_BIT);

// draw the triangle
drawable.draw();